Replace MatrixClient.isCryptoEnabled by MatrixClient.getCrypto (#140)

* Replace `MatrixClient.isCryptoEnabled` by `MatrixClient.getCrypto`

* Cast `cryptoEnabled` as `boolean`

* Fix `MatrixChat-test`

(cherry picked from commit 950ab1940bfcea9443f03284f9175d319c13a44c)

test/test-utils/client.ts

@@ -141,7 +141,6 @@ export const mockClientMethodsDevice = (
 export const mockClientMethodsCrypto = (): Partial<
     Record<MethodLikeKeys<MatrixClient> & PropertyLikeKeys<MatrixClient>, unknown>
 > => ({
-    isCryptoEnabled: jest.fn(),
     isCrossSigningReady: jest.fn(),
     isKeyBackupKeyStored: jest.fn(),
     getCrossSigningCacheCallbacks: jest.fn().mockReturnValue({ getCrossSigningKeyCache: jest.fn() }),

test/test-utils/test-utils.ts

@@ -212,7 +212,6 @@ export function createTestClient(): MatrixClient {
         relations: jest.fn().mockResolvedValue({
             events: [],
         }),
-        isCryptoEnabled: jest.fn().mockReturnValue(false),
         hasLazyLoadMembersEnabled: jest.fn().mockReturnValue(false),
         isInitialSyncComplete: jest.fn().mockReturnValue(true),
         downloadKeys: jest.fn(),